Befillable fuse



H. I. BASHLOW. I

REFILLABLE FUSE..

APPLICATION FILED FEB-9,19IB.

1,326,834. Patehted Dec. 30,1919.

INVENTOH Harry B45510;

WITNESSES WJW z 4491/ M I ATTORNEY UNITED srnrns PATENT OFFICE.

HARRY I. BASHLOW, OF SOUTH MANCHESTER, CONNECTICUT. I

REFILLABLE FUsn.

Specification of Letters Patent.

Patented Dec. 30., 1919.

Application filed February 9, 1918. Serial No. 216,417.

fuses and has for an objectto provide a.

fuse plug of the cylindrical type, constructed in a manner to permit the insertion therein of a fusible element, and to permit the fusible element to be replaced by another when the fuse is-broken.

Another object of the invention is to provide a refillable fuse plug of the character above set forth, particularly adapted for use' in lighting circuits of motor vehicles, containing a fusible element that may be readily replaced when broken thereby economizing in the use of fuses.

A still further object of the invention is to provide a fuse plug having the above named characteristics, which is simple in construction,'free from danger in its use and operation and which may be manufactured at a nominal cost.

In addition to the foregoing my invention comprehends improvements in the details of construction and arrangement of the parts to be hereinafter more fully described and particularly set forth in the appended claims.

In the accompanying drawings in which similar and corresponding parts are designated by the same characters of reference throughout the several views in which they appear Figure 1, is a view in side elevation of a fuse plug constructed in accordance with my invention.

Fig. 2, is a view thereof partly in section, to illustrate the interior thereof.

Fig. 3, is a view of the device in end view and Fig. 4, is a transverse section taken on the line 44 of Fig. 1.

With reference to the drawings, 10 indicates a cylindrical hollow casing of fiber or other insulating material having .1. brass or other metallic band 11 around each end, each band being of the annular type having each end open. The ends of the casing 10 are closed by means of plugs 12 of conducting material, each plug having a peripheral longitudinally extending groove 13. Each end band 11 is formed interiorly witha longitudinally extending rib -or key 1% for disposition in opposition to the groove 13 of the plug whereby the material of the casing may be piessedinto said groove 13, and the band, casing and plug locked securely together against relative rotation. Each end plug 12 is formed with a central opening 15 whereby a fusible element .16, such as a short section of wire may be inserted in the opening, to extend entirely through the casing in spaced relation to the interior'thereof, and to snugly fit said openings 15. A. pair of set screws 17 are provided, entering threaded apertures in the bands- 11 and in the ends of the casing 10, and radially extending, threaded openings in the plugs 12 and intersecting the openings 15 thereof, as shown in Fig. 4c. The set screws 17 when inserted in the manner stated are designed to engage the ends of the fuse wire so as to securely lock the same in place, and to form an intimate contact with the metallic plugs 12, the electrical connection to the bands be ing established through the medium of the screws 17.

In use the device is inserted in a holder having the usual fingers or other contacts designed to engage the bands 11 whereby the circuit is established through one band, its penetrating screw, the adjacent plug 12, through the fuse element to the other plug 12, thence through the screw 17 and band at the opposite end of the fuse to the circuit. Itwill be obvious that in the event that the fuse wire is broken by the transmission therethrough of current exceeding the allotted amount, the ends of the broken fuse may be readily withdrawn from the casing by disengaging the set screws 17 and a new fuse wire inserted. If desired the interior of the casing may be filled with granular material 20 such as plaster of Paris or the like to absorb the heat and molten metal and to prevent injury to the fibrous casing.

While I have illustrated and described my invention with some degree of particularity I realize that in practice various alterations thereof may be made, and I therefore desire to reserve the right and privilege of changing the form of the details of construction, or otherwise altering the arrangement of the correlative parts without departing from the spirit of the invention or the scope of the appended claims. I

Having thus described my invention What I claim as new and desire to secure by Letters Patent is 1. A fuse plug comprising a normally cylindrical casing of insulating material, a metal plug in each end thereof having a longitudinal groove in its periphery, a metal bandclamped around each end of the casing and having an internal key adapted to force the material of the easing into said groove, a fuse wire connecting the plugs and means for establishing electrical connection be tween each band and its contained plug.

2. A fuse plug comprising a normally cylindrical casing of insulating material, a metal plug in each end thereof having a longitudinal groove in its periphery, a metal band clamped around each end of the casing and having an internal liey adapted to force the material of the casing into said groove, a fuse wire connecting the plugs and extending along the axis of said casing, granular material in the latter around the wire, and a set screw through each band and the casing and into the plug and contacting with said wire.

3. A fuse plug comprising a normally cylindrical casing of insulating material, a metal plug in each end thereof having a depression in its periphery, a metal band clamped around each end of the casing and having an internal projection adapted to force the material of the easing into said depression, a fuse wire connecting the plugs and extending along the axis of said casing, granular material in the latter around the Wire, and a set screw through each band and the casing and into the plug and contacting with said wire. I

l. An electric fuse plug including a cylindrical casing of insulating material, metallic plugs closing the ends thereof and having central openings and longitudinally extending peripheral grooves, a fusible element having its ends seated in the openings in the plugs, bands encircling the ends of the casing, a longitudinally extending key formed interiorly of each band to press the material of the casing 1nto the groove of the plug and secure the members against relative rotary movement, and set screws entering the bands, casing and plugs, to

engage the ends of the fusible element and secure the same in place.

In testimony whereof I affix my signature in presence of two witnesses.

HARRY I. BASHLOW. Witnesses:

JAMES J. ROHAN, LEO T. RYAN. 

